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#!/system/bin/sh
# This is run by the Android app, and runs a shell in an environment
# configured for git-annex.

set -e

# I'm installed as lib/lib.runshell.so
orig="$(pwd)"
cd "$0/../.."
base="$(pwd)"
cd "$orig"

# Cannot rely on Android providing a sane HOME
HOME="/sdcard/git-annex.home"
export HOME

setup () {
	echo "Installation starting to $base"
	mkdir -p "$base/bin"
	for prog in busybox git-annex git-shell git-upload-pack git gpg rsync ssh ssh-keygen; do
		echo "installing $prog"
		ln $base/lib/lib.$prog.so $base/bin/$prog
	done
	$base/bin/busybox --install $base/bin
	$base/bin/tar zxf lib/lib.git.tar.gz.so

	for prog in git git-shell git-upload-pack; do
		for link in $(cat $base/links/$prog); do
			echo "linking $link to $prog"
			ln $base/bin/$prog $base/$link
		done
		rm $base/links/$prog
	done

	mkdir -p "$base/templates"
	mkdir -p "$base/tmp"
	echo "Installation complete"
}

if [ ! -d "$base/bin" ]; then
	if ! mkdir -p "$HOME"; then
		echo "mkdir of $HOME failed!"
	fi
	if ! setup > $HOME/git-annex-install.log 2>&1; then
		echo "Installation failed! Please report a bug and attach $HOME/git-annex-install.log"
		sh
	fi
fi

PATH="$base/bin:$PATH"
export PATH

ORIG_GIT_EXEC_PATH="$GIT_EXEC_PATH"
export ORIG_GIT_EXEC_PATH
GIT_EXEC_PATH=$base/libexec/git-core
export GIT_EXEC_PATH

ORIG_GIT_TEMPLATE_DIR="$GIT_TEMPLATE_DIR"
export ORIG_GIT_TEMPLATE_DIR
GIT_TEMPLATE_DIR="$base/templates"
export GIT_TEMPLATE_DIR

# Indicate which variables were exported above.
GIT_ANNEX_STANDLONE_ENV="GIT_EXEC_PATH GIT_TEMPLATE_DIR"
export GIT_ANNEX_STANDLONE_ENV

# This is a temporary directory on a non-crippled filesystem.
# This needs to be as short a path as possible.
GIT_ANNEX_TMP_DIR=$base/tmp
export GIT_ANNEX_TMP_DIR

if [ "$1" ]; then
	cmd="$1"
	shift 1
	exec "$cmd" "$@"
else
	sh
fi